采用两种不同的添加方式,研究了Ba2+部分取代Pb2+所获得的PZN基铁电陶瓷的结构和介电性能.一种是BaCO3、PbO和ZnNb2O6进行预合成,然后烧结制备PZN基陶瓷;另一种是ZnNb2O6先分别与BaCO3、PbO进行预合成,然后再将两种预合成产物进一步烧结制备PZN基陶瓷.实验结果表明:随Ba2+取代量的增加,不同添加方式制备的陶瓷其钙钛矿相的稳定性增强;介电性能先上升然后又下降,相变温度Tm移向低温.比较Ba2+的两种不同添加方式,前者制备的陶瓷具有相对较低的Tm值和较小的晶粒尺寸,添加8mol%的Ba2+即可获得100%的钙钛矿结构;而后者为获得100%的钙钛矿结构则需要25mol%Ba2+.
参考文献
| [1] | Swartz S L;Shrout T R .Fabrication of perovskite lead magnesium niobate[J].Materials Research Bulletin,1982,17:1245-1250. |
| [2] | Shrout T R;Hallival A .Preparation of lead-based ferroelectric relaxor for capacitors[J].American Ceramic Society Bulletin,1987,66:704-711. |
| [3] | Swartz S L;Shrout T R;Schulze W A et al.Dielectric properties of lead magnesium niobate ceramics[J].Journal of the American Ceramic Society,1984,67:311-315. |
| [4] | Sekar MMA.;Halliyal A. .Low-temperature synthesis, characterization, and properties of lead-based ferroelectric niobates[J].Journal of the American Ceramic Society,1998(2):380-388. |
| [5] | Belsick J R;Halliyal A;Kumar U et al.Phase relation and dielectric properties of ceramics in the system Pb (Zn1/3Nb2/3) O3-SrTiO3-PbTiO3[J].American Ceramic Society Bulletin,1987,66:664-667. |
| [6] | Hallival A;Kumar U;Newnham R E et al.Dielectric and ferroelectric properties of ceramics in the Pb(Zn1/3 Nb2/3)O3-BaTiO3-PbTiO3 System[J].Journal of the American Ceramic Society,1987,70:119-124. |
| [7] | Hallival A;Kumar U;Newnham R E et al.Stabilization of the perovskite phase and dielectric properties of ceramids in the Pb(Zn1/3 Nb2/3) O3-BaTiO3 system[J].American Ceramic Society Bulletin,1987,66:671-676. |
| [8] | Villegas M.;Caballero A.C. .Influence of Processing Parameters on the Sintering and Electrical Properties of Pb(Zn_(1/3)Nb_(2/3))O_3-Based Ceramics[J].Journal of the American Ceramic Society,2000(1):141-146. |
| [9] | 李亚兵,王晓莉.PZN-BZN和PZN-BT陶瓷介电性能研究[J].功能材料与器件学报,2004(02):215-220. |
| [10] | Kang S G;Kim H;Takahashi K et al.Synthesis and properties of (1-x) PZN-xBZN solid-solution compounds by liquid-evaporation method[J].Japanese Journal of Applied Physics,1994,33:5407-5411. |
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